Table 4. Molar Mass of the Bioactive Films before and after Use As Mulch, Measured by GPC^a.

Sample	Mn	Mw	Mw/Mn
0%-before	7700	83400	10.8
0%-after	7200	78600	10.9
1%-before	6700	68200	10.2
1%-after	7000	65900	9.4
2.5%-before	4700	60700	12.9
2.5%-after	5700	59600	10.4
5%-before	3600	41200	11.4
5-after	5700	53800	9.4
7.5%-before	4100	39300	9.5
7.5%-after	3600	43300	12.0
10%-before	2700	34000	12.5
10%-after	3500	36500	10.3

^aM_n is the number averaged molar mass, and M_w is the weight averaged molar mass. The M_w/M_n is a measure of the dispersity of the molar mass distribution. The percentage indicates the MCPA-PHBV oligomer concentration in the films.